You know, when you look at that footage, I can understand why William Shatner was unaware cast members like Nichols, Takei, et al held a grudge afterwards, as it all seems pretty lighthearted and smiles abound as they are 'blowing off steam' between takes.

I really have to wonder if they held any grudge at the time, or if these grudges developed and grew later as the popularity of the show increased in syndication, leading to personal Star Trek Convention appearances, etc. - and they need something to talk about to make those appearances more interesting over the years?